/* ============================================================
   Ruminate — Coming Soon · main.css
   Design System: CSS Custom Properties (Design Tokens)
   Architecture: Mobile-first Flexbox/Grid, Composited Layers
   ============================================================ */

/* ── 1. Design Tokens ──────────────────────────────────────── */
:root {
  /* Colors */
  --color-bg:            #ecf1f4;
  --color-bg-glass:      rgba(255, 255, 255, 0.65);
  --color-bg-glass-nav:  rgba(236, 241, 244, 0.82);
  --color-primary:       #135666;
  --color-primary-hover: #0e3f4d;
  --color-primary-light: #1a7a92;
  --color-secondary:     #2196b0;
  --color-text-head:     #0d2b33;
  --color-text-body:     #3a4d55;
  --color-text-muted:    #7a8f97;
  --color-border:        #cbd5e1;
  --color-border-focus:  #135666;
  --color-white:         #ffffff;
  --color-error:         #c0392b;
  --color-success:       #1a7a45;

  /* Typography */
  --font-serif:  'Playfair Display', 'Georgia', 'Times New Roman', serif;
  --font-sans:   'Inter', 'system-ui', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Fluid Type Scale (clamp: min, preferred, max) */
  --text-display: clamp(3rem, 9vw, 7.5rem);
  --text-h2:      clamp(1.5rem, 3.5vw, 2.5rem);
  --text-h3:      clamp(1.15rem, 2.5vw, 1.6rem);
  --text-tagline: clamp(1rem, 2.2vw, 1.4rem);
  --text-body:    clamp(0.9rem, 1.8vw, 1.05rem);
  --text-small:   0.825rem;
  --text-nav:     0.875rem;

  /* Spacing */
  --space-xs:   0.375rem;
  --space-sm:   0.75rem;
  --space-md:   1.25rem;
  --space-lg:   2rem;
  --space-xl:   3.5rem;
  --space-2xl:  6rem;
  --space-3xl:  9rem;

  /* Layout */
  --container-max:  1120px;
  --container-pad:  clamp(1.25rem, 5vw, 3rem);
  --radius-sm:      6px;
  --radius-md:      12px;
  --radius-lg:      20px;
  --radius-pill:    100px;

  /* Shadows */
  --shadow-sm:   0 2px 8px rgba(19, 86, 102, 0.07);
  --shadow-md:   0 8px 32px rgba(19, 86, 102, 0.12);
  --shadow-lg:   0 20px 60px rgba(19, 86, 102, 0.16);
  --shadow-btn:  0 4px 16px rgba(19, 86, 102, 0.3);
  --shadow-glow: 0 0 0 4px rgba(19, 86, 102, 0.18);

  /* Transitions */
  --ease-out:    cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast:   150ms;
  --duration-mid:    280ms;
  --duration-slow:   500ms;
  --duration-enter:  900ms;
}


/* ── 2. Reset & Base ───────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text-body);
  font-family: var(--font-sans);
  font-size: var(--text-body);
  line-height: 1.7;
  overflow-x: hidden;
  /* Subtle noise texture for photographic depth */
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)' opacity='0.025'/%3E%3C/svg%3E");
}

img, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--duration-mid) var(--ease-out),
              opacity var(--duration-mid) var(--ease-out);
}

a:hover {
  color: var(--color-primary-light);
}

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

ul {
  list-style: none;
}


/* ── 3. Utility Classes ────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ── 4. Preloader ──────────────────────────────────────────── */
#preloader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background-color: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity var(--duration-slow) var(--ease-out),
              visibility var(--duration-slow) var(--ease-out);
}

#preloader.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.preloader__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

.preloader__wordmark {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.01em;
  opacity: 0;
  transform: translateY(12px);
  animation: preloaderReveal 0.7s var(--ease-out) 0.2s forwards;
}

.preloader__bar-track {
  width: clamp(100px, 20vw, 180px);
  height: 2px;
  background-color: var(--color-border);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.preloader__bar-fill {
  height: 100%;
  width: 0%;
  background-color: var(--color-primary);
  border-radius: var(--radius-pill);
  animation: preloaderBar 1.2s var(--ease-out) 0.3s forwards;
}

@keyframes preloaderReveal {
  to { opacity: 1; transform: translateY(0); }
}

@keyframes preloaderBar {
  to { width: 100%; }
}


/* ── 5. Navigation ─────────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding-block: var(--space-md);
  backdrop-filter: blur(14px) saturate(1.4);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  background-color: var(--color-bg-glass-nav);
  border-bottom: 1px solid rgba(203, 213, 225, 0.45);
  transform: translateY(0);
  transition: transform var(--duration-mid) var(--ease-out),
              box-shadow var(--duration-mid) var(--ease-out),
              background-color var(--duration-mid) var(--ease-out);
  will-change: transform;
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-sm);
}

.site-header.is-hidden {
  transform: translateY(-100%);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.nav__logo {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.01em;
  line-height: 1;
  transition: opacity var(--duration-fast) var(--ease-out);
}

.nav__logo:hover {
  color: var(--color-primary);
  opacity: 0.8;
}

.nav__org-link {
  font-size: var(--text-nav);
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.01em;
  white-space: nowrap;
  transition: color var(--duration-mid) var(--ease-out);
}

.nav__org-link:hover {
  color: var(--color-primary);
}

.nav__org-link span {
  font-weight: 600;
  color: var(--color-text-body);
  transition: color var(--duration-mid) var(--ease-out);
}

.nav__org-link:hover span {
  color: var(--color-primary);
}


/* ── 6. Hero Section ───────────────────────────────────────── */
.hero {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: calc(var(--space-3xl) + 40px);
  padding-bottom: var(--space-2xl);
}

.hero__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0;
  width: 100%;
}

/* App title */
.hero__title {
  font-family: var(--font-serif);
  font-size: var(--text-display);
  font-weight: 800;
  color: var(--color-text-head);
  letter-spacing: -0.03em;
  line-height: 0.92;
  margin-bottom: var(--space-lg);
  /* Each word wrapped for stagger animation */
  overflow: hidden;
}

.hero__title-word {
  display: inline-block;
  transform: translateY(110%);
  opacity: 0;
  will-change: transform, opacity;
}

/* Tagline */
.hero__tagline {
  font-family: var(--font-sans);
  font-size: var(--text-tagline);
  font-weight: 400;
  font-style: italic;
  color: var(--color-text-muted);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin-bottom: var(--space-xl);
  opacity: 0;
  transform: translateY(16px);
  will-change: transform, opacity;
}

/* Illustration container */
.hero__illustration-wrap {
  position: relative;
  width: 100%;
  max-width: 580px;
  margin-inline: auto;
  margin-bottom: var(--space-xl);
  opacity: 0;
  transform: translateY(24px) scale(0.97);
  will-change: transform, opacity;
}

.hero__illustration-wrap::before {
  content: '';
  position: absolute;
  inset: -10%;
  border-radius: 50%;
  background: radial-gradient(ellipse at center, rgba(25, 122, 146, 0.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.hero__illustration {
  position: relative;
  z-index: 1;
  width: 100%;
  height: auto;
  filter: drop-shadow(0 12px 40px rgba(19, 86, 102, 0.1));
  transition: transform var(--duration-slow) var(--ease-spring),
              filter var(--duration-slow) var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .hero__illustration-wrap:hover .hero__illustration {
    transform: translateY(-8px) scale(1.015);
    filter: drop-shadow(0 24px 60px rgba(19, 86, 102, 0.18));
  }
}

/* Blurb paragraph */
.hero__blurb {
  font-size: var(--text-body);
  color: var(--color-text-body);
  max-width: 560px;
  margin-inline: auto;
  margin-bottom: var(--space-xl);
  line-height: 1.8;
  opacity: 0;
  transform: translateY(16px);
  will-change: transform, opacity;
}

.hero__blurb strong {
  color: var(--color-primary);
  font-weight: 600;
}


/* ── 7. CTA Section ────────────────────────────────────────── */
.cta-section {
  padding-block: var(--space-2xl) var(--space-3xl);
}

.cta__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-lg);
}

.cta__heading {
  font-family: var(--font-serif);
  font-size: var(--text-h2);
  font-weight: 700;
  color: var(--color-text-head);
  letter-spacing: -0.02em;
}

.cta__subtext {
  font-size: var(--text-body);
  color: var(--color-text-muted);
  max-width: 420px;
}

/* Email form */
.cta__form {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: var(--space-sm);
  width: 100%;
  max-width: 480px;
}

@media (min-width: 540px) {
  .cta__form {
    flex-direction: row;
    align-items: center;
  }
}

.cta__input {
  flex: 1 1 auto;
  padding: 0.875rem 1.125rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  font-family: var(--font-sans);
  font-size: var(--text-body);
  color: var(--color-text-head);
  outline: none;
  transition: border-color var(--duration-mid) var(--ease-out),
              box-shadow var(--duration-mid) var(--ease-out),
              transform var(--duration-mid) var(--ease-spring);
  -webkit-appearance: none;
}

.cta__input::placeholder {
  color: var(--color-text-muted);
  font-size: var(--text-body);
}

.cta__input:focus {
  border-color: var(--color-border-focus);
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
}

.cta__input:focus::placeholder {
  opacity: 0.6;
}

/* Primary action button */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: 0.875rem 1.625rem;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-family: var(--font-sans);
  font-size: var(--text-body);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  white-space: nowrap;
  box-shadow: var(--shadow-btn);
  transition: background-color var(--duration-mid) var(--ease-out),
              transform var(--duration-mid) var(--ease-spring),
              box-shadow var(--duration-mid) var(--ease-out);
  will-change: transform;
  -webkit-appearance: none;
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 28px rgba(19, 86, 102, 0.38);
}

.btn-primary:active {
  transform: translateY(0) scale(0.98);
  box-shadow: var(--shadow-btn);
}

.btn-primary:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

.btn-primary svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  transition: transform var(--duration-mid) var(--ease-spring);
}

.btn-primary:hover svg {
  transform: translateX(3px);
}

/* Form feedback states */
.cta__feedback {
  font-size: var(--text-small);
  font-weight: 500;
  min-height: 1.4em;
  transition: opacity var(--duration-mid) var(--ease-out),
              color var(--duration-mid) var(--ease-out);
}

.cta__feedback.is-error  { color: var(--color-error); }
.cta__feedback.is-success { color: var(--color-success); }

/* Privacy note under form */
.cta__privacy {
  font-size: var(--text-small);
  color: var(--color-text-muted);
}

.cta__privacy a {
  color: var(--color-text-muted);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.cta__privacy a:hover {
  color: var(--color-primary);
}


/* ── 8. Footer ─────────────────────────────────────────────── */
.site-footer {
  padding-block: var(--space-xl);
  border-top: 1px solid var(--color-border);
  background-color: rgba(255, 255, 255, 0.45);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-md);
}

@media (min-width: 640px) {
  .footer__inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer__copy {
  font-size: var(--text-small);
  color: var(--color-text-muted);
}

.footer__links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
  justify-content: center;
}

.footer__links a {
  font-size: var(--text-small);
  color: var(--color-text-muted);
  transition: color var(--duration-mid) var(--ease-out);
}

.footer__links a:hover {
  color: var(--color-primary);
}

.footer__divider {
  color: var(--color-border);
  user-select: none;
}


/* ── 9. Decorative Background Elements ─────────────────────── */
.bg-orb {
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: -1;
  filter: blur(80px);
  opacity: 0;
  transition: opacity 1.2s var(--ease-out);
}

.bg-orb--1 {
  width: clamp(300px, 40vw, 560px);
  height: clamp(300px, 40vw, 560px);
  background: radial-gradient(circle, rgba(19, 86, 102, 0.07) 0%, transparent 70%);
  top: -10%;
  right: -10%;
}

.bg-orb--2 {
  width: clamp(200px, 30vw, 400px);
  height: clamp(200px, 30vw, 400px);
  background: radial-gradient(circle, rgba(33, 150, 176, 0.05) 0%, transparent 70%);
  bottom: 15%;
  left: -8%;
}

body.content-ready .bg-orb {
  opacity: 1;
}


/* ── 10. Scroll Reveal Utility ─────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  will-change: transform, opacity;
  transition: opacity var(--duration-enter) var(--ease-out),
              transform var(--duration-enter) var(--ease-out);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}


/* ── 11. Reduced Motion Accessibility ──────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .hero__title-word,
  .hero__tagline,
  .hero__illustration-wrap,
  .hero__blurb,
  .cta__heading,
  .cta__subtext,
  .cta__form,
  .cta__privacy {
    opacity: 1 !important;
    transform: none !important;
  }
}


/* ── 12. Responsive Refinements ────────────────────────────── */
@media (max-width: 480px) {
  .nav__org-link .nav__org-prefix {
    display: none;
  }

  .hero {
    padding-top: calc(var(--space-2xl) + 60px);
  }
}

@media (min-width: 768px) {
  .hero__illustration-wrap {
    max-width: 640px;
  }
}

@media (min-width: 1024px) {
  .hero__illustration-wrap {
    max-width: 700px;
  }
}